A51 MACRO ASSEMBLER  P1口觃用_一_                                                         05/01/2008 16:06:05 PAGE     1


MACRO ASSEMBLER A51 V7.07
OBJECT MODULE PLACED IN P1口應(yīng)用(一).OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE P1口應(yīng)用(一).ASM SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

0030                   1          ORG  0030H
0030 74FF              2          MOV  A,#0FFH     ;將P1口全置1
0032 F590              3          MOV  P1,A
0034 309205            4          JNB   P1.2,LOOP1 ;P1.2是否為低電平
0037 C290              5     LOOP:CLR  P1.0        ;不是低電平，P1.0驅(qū)動藍(lán)色二極管點(diǎn)亮
0039 12003E            6          LCALL EXIT  
003C C291              7     LOOP1:CLR P1.1        ;P1.2為低電平，P1.1驅(qū)動綠色二極管點(diǎn)亮
003E 00                8     EXIT:NOP
                       9          END
                             
A51 MACRO ASSEMBLER  P1口觃用_一_                                                         05/01/2008 16:06:05 PAGE     2

SYMBOL TABLE LISTING
------ ----- -------


N A M E             T Y P E  V A L U E   ATTRIBUTES

EXIT . . . . . . .  C ADDR   003EH   A   
LOOP . . . . . . .  C ADDR   0037H   A   
LOOP1. . . . . . .  C ADDR   003CH   A   
P1 . . . . . . . .  D ADDR   0090H   A   


REGISTER BANK(S) USED: 0 

ASSEMBLY COMPLETE.  0 WARNING(S), 0 ERROR(S)